I do like a good speed run when everything clicks. But getting an ideal group for a speed run in the Duty Finder, or Roulette is really a crap-shoot and you really shouldn't count on it, rather, the expectation from these shouldn't be a fast run, but rather a smooth, fun run.

Square Enix wouldn't have to tweak anything if more people simply took a moment to talk among themselves right at the start. The tank really should ask the group if they would be comfortable doing a speed run, and if they say no, then they should abide by the wishes of the group.

Good tanks can tell right-off the kind of tempo they should set to get their group through the dungeon. Personally, I do like running at as quick a tempo as I can manage, which can be slow at time. As long as everyone in the group is trying their hardest, and we all have fun, than really that's all I can ask for.